How do I fund a REIT?

How do I fund a REIT, exactly? What are the different methods available to me, and what are the pros and cons of each? Do I need to have a significant amount of capital upfront, or are there ways to invest in REITs with smaller amounts of money? Also, are there any specific regulations or restrictions I should be aware of when it comes to funding a REIT? I'd like to have a clear understanding of the entire process before I make any decisions.